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fix(fft): restore previous PI approximation

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This commit is contained in:
Nicolas Sarlin
2025-09-01 14:54:20 +02:00
parent cd92146c38
commit 3e8c751c5c
1 changed files with 3 additions and 1 deletions
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4
tfhe-fft/src/fft_simd.rs
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@@ -276,7 +276,9 @@ pub fn sincospi64(mut a: f64) -> (f64, f64) {
let s = s * t; let s = s * t;
r *= s; r *= s;
let mut s = fma(t, f64::consts::PI, r); // Noise analysis has been done based on this precise value
#[allow(clippy::approx_constant)]
let mut s = fma(t, 3.1415926535897931e+0, r);
// map results according to quadrant // map results according to quadrant
if (i & 2) != 0 { if (i & 2) != 0 {